{-# LANGUAGE CPP #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE EmptyDataDecls #-}
{-# LANGUAGE TypeFamilies #-}
#if __GLASGOW_HASKELL__ >= 702
{-# LANGUAGE DeriveGeneric #-}
#endif
#if __GLASGOW_HASKELL__ >= 706
{-# LANGUAGE PolyKinds #-}
#endif
#if __GLASGOW_HASKELL__ >= 708
{-# LANGUAGE Safe #-}
#elif __GLASGOW_HASKELL__ >= 702
{-# LANGUAGE Trustworthy #-}
#endif
#include "bifunctors-common.h"
module Data.Bifunctor.Wrapped
( WrappedBifunctor(..)
) where
#if __GLASGOW_HASKELL__ < 710
import Control.Applicative
#endif
import Data.Biapplicative
import Data.Bifoldable
import Data.Bitraversable
#if __GLASGOW_HASKELL__ < 710
import Data.Foldable
import Data.Monoid
import Data.Traversable
#endif
#if __GLASGOW_HASKELL__ >= 708
import Data.Typeable
#endif
#if __GLASGOW_HASKELL__ >= 702
import GHC.Generics
#endif
#if LIFTED_FUNCTOR_CLASSES
import Data.Functor.Classes
#endif
newtype WrappedBifunctor p a b = WrapBifunctor { unwrapBifunctor :: p a b }
deriving ( Eq, Ord, Show, Read
#if __GLASGOW_HASKELL__ >= 702
, Generic
#endif
#if __GLASGOW_HASKELL__ >= 708
, Generic1
, Typeable
#endif
)
#if __GLASGOW_HASKELL__ >= 702 && __GLASGOW_HASKELL__ < 708
data WrappedBifunctorMetaData
data WrappedBifunctorMetaCons
data WrappedBifunctorMetaSel
instance Datatype WrappedBifunctorMetaData where
datatypeName = const "WrappedBifunctor"
moduleName = const "Data.Bifunctor.Wrapped"
instance Constructor WrappedBifunctorMetaCons where
conName = const "WrapBifunctor"
conIsRecord = const True
instance Selector WrappedBifunctorMetaSel where
selName = const "unwrapBifunctor"
instance Generic1 (WrappedBifunctor p a) where
type Rep1 (WrappedBifunctor p a) = D1 WrappedBifunctorMetaData
(C1 WrappedBifunctorMetaCons
(S1 WrappedBifunctorMetaSel (Rec1 (p a))))
from1 = M1 . M1 . M1 . Rec1 . unwrapBifunctor
to1 = WrapBifunctor . unRec1 . unM1 . unM1 . unM1
#endif
#if LIFTED_FUNCTOR_CLASSES
instance (Eq2 p, Eq a) => Eq1 (WrappedBifunctor p a) where
liftEq = liftEq2 (==)
instance Eq2 p => Eq2 (WrappedBifunctor p) where
liftEq2 f g (WrapBifunctor x) (WrapBifunctor y) = liftEq2 f g x y
instance (Ord2 p, Ord a) => Ord1 (WrappedBifunctor p a) where
liftCompare = liftCompare2 compare
instance Ord2 p => Ord2 (WrappedBifunctor p) where
liftCompare2 f g (WrapBifunctor x) (WrapBifunctor y) = liftCompare2 f g x y
instance (Read2 p, Read a) => Read1 (WrappedBifunctor p a) where
liftReadsPrec = liftReadsPrec2 readsPrec readList
instance Read2 p => Read2 (WrappedBifunctor p) where
liftReadsPrec2 rp1 rl1 rp2 rl2 p = readParen (p > 10) $ \s0 -> do
("WrapBifunctor", s1) <- lex s0
("{", s2) <- lex s1
("unwrapBifunctor", s3) <- lex s2
(x, s4) <- liftReadsPrec2 rp1 rl1 rp2 rl2 0 s3
("}", s5) <- lex s4
return (WrapBifunctor x, s5)
instance (Show2 p, Show a) => Show1 (WrappedBifunctor p a) where
liftShowsPrec = liftShowsPrec2 showsPrec showList
instance Show2 p => Show2 (WrappedBifunctor p) where
liftShowsPrec2 sp1 sl1 sp2 sl2 p (WrapBifunctor x) = showParen (p > 10) $
showString "WrapBifunctor {unwrapBifunctor = "
. liftShowsPrec2 sp1 sl1 sp2 sl2 0 x
. showChar '}'
#endif
instance Bifunctor p => Bifunctor (WrappedBifunctor p) where
first f = WrapBifunctor . first f . unwrapBifunctor
{-# INLINE first #-}
second f = WrapBifunctor . second f . unwrapBifunctor
{-# INLINE second #-}
bimap f g = WrapBifunctor . bimap f g . unwrapBifunctor
{-# INLINE bimap #-}
instance Bifunctor p => Functor (WrappedBifunctor p a) where
fmap f = WrapBifunctor . second f . unwrapBifunctor
{-# INLINE fmap #-}
instance Biapplicative p => Biapplicative (WrappedBifunctor p) where
bipure a b = WrapBifunctor (bipure a b)
{-# INLINE bipure #-}
WrapBifunctor fg <<*>> WrapBifunctor xy = WrapBifunctor (fg <<*>> xy)
{-# INLINE (<<*>>) #-}
instance Bifoldable p => Foldable (WrappedBifunctor p a) where
foldMap f = bifoldMap (const mempty) f . unwrapBifunctor
{-# INLINE foldMap #-}
instance Bifoldable p => Bifoldable (WrappedBifunctor p) where
bifoldMap f g = bifoldMap f g . unwrapBifunctor
{-# INLINE bifoldMap #-}
instance Bitraversable p => Traversable (WrappedBifunctor p a) where
traverse f = fmap WrapBifunctor . bitraverse pure f . unwrapBifunctor
{-# INLINE traverse #-}
instance Bitraversable p => Bitraversable (WrappedBifunctor p) where
bitraverse f g = fmap WrapBifunctor . bitraverse f g . unwrapBifunctor
{-# INLINE bitraverse #-}